Answer:
B. It gives the text an encouraging tone.
Step-by-step explanation:
Something that is encouraging gives support to a particular cause of action. The author's diction, that is, his choice of words and vocabulary shows that he gave support to the lifestyle of frugality.
He introduced the passage by saying that it is well or good for a man to live a life of frugality. He then gave examples to support his point of view. So, it can be deduced that the author was encouraging a lifestyle of frugality.